Staple band for stapling devices of all kinds



PatentedA June 26, 1934 UNITED STATES STAPLE BAND FOR STAPLING DEVICES F ALL KINDS Ludwig Sachs, Vienna, Austria Application March 31,1933, serial No. 663,795`

In Austria. March 31, 1932 Claims.

This invention relates to staple bands for stapling devices of all kinds, such as stapling pliers, stapli/ng apparatuses, power driven stapling machines or the like. The staple band is utilized either in the form of staple bars of definite lengths with the staple branches bent down at right angles, or in the form of aplane band which can be wound or reeled up and the two longitudinal edges of which are bent down prior to performing the stapling so as to form the branches of the staples.'

The staple band may be produced in the known manner by stamping from a sheet metalI band,

the subsequent staples being interconnected by a web along the centre line of the bridge of the staples (asin German patent specification No. 540,837) or by two webs along lines on both sides of the centre line (U. S. A. patent specication No. 1,733,506).

The staple band'may also be constructed from individual staples by placing a number of staples in a row and uniting them to a staple band by means of an adhesive applied to the bridge of the band or to the whole surface of it. Such interconnecting of the staples may be eiected by means other than an adhesive, such as lacquering or soldering, coating by electrolysis or the like (German patent speciiication No. 287,820,

"British patent specication No. 274,547, U. S. A. 3o patent specification No. 1,557,121).

As distinct from these staple bands the staple band according to the invention is characterized in that the staples, in one form of application of the band (the staple bar referred to) are inter-` connected only at their branches, preferably the ends of the branches; in the other form of application, that is to say the plane or iiat band, the staples are interconnected only at the longitudinal edges whichv are subsequently bent 4() down to form the branches of the staples.

By forming the staple band in this manner considerable advantages are secured in various directions.

The moment of resistance of the staple band against bending (being broken up) and against shearing oi (separating the staples in the stapling device) depends on the area of the material connecting the individual staples. Since .this area in the known staple bands forms a 5d horizontal rectangle of bsmall height (for example in the shape of a connecting web, a film gt-solderor the like lupon the bridge), while in present staplel-band it forms an upright -,-"reetang'l elcated at both staple branches (see 'lichting','i especially 'ligurefS), the moment of,

resistance of the connecting material against shearing. remains the same if the area is the same, the moment of resistance against bending, however, is y much greater (as for example in the case of a ruler or a T-square it is greater in the direction of height'than in the direction of width). Accordingly, the resistance of the present staple band against bending V:and breaking up while being handled (or when dropped on the oor) is considerably increased, .the ease of separation of the individual staples in the stapling device being, at the same time, preserved.

'I'he bridge of the staple bar is supported in the` stapling device by the guide bar which, when the pressing blade separates the foremost staple on being depressed, serves as a counter face for said pressing blade. Consequently, the downwardly acting pressing blade inthe case of the known staple bands acts direct on the connecting material (connecting web, lacquer, solder or -the 7l like) and thus the pressing blade as well as the guide bar become unduly worn after a comparatively short time, thus causing troubles in stapling. This defect is eliminated with the present staple band, because here the connecting material is disposed on the branches only and therefore leaves the bridge of the staples quite free, so that when the staples are separated no direct shearing/effect takes place at the contact point of the pressing blade. `For this reason, 85 with the present staple band it is impossible Vthat shavings or residue resulting from the separation of the connecting material should remain on the guide bar thereby impeding the feeding of the staple band, as is the case with the known staple bands. In those known staple bands or bars wherein the staples are interconnected on the bridge by means of a web, it often happens that individual staple branches are bent out .of the plane of the branches and further that individual staples are turned round the web after the manner of a two armed lever and are either slantingly positioned, or breako, thus causing trouble instapling. This defect in the staple bands according to the invention is prevented because it is atl the branches, that is to say at the ends thereof, where the staples are interconnected. Also, in the staple bands of iiat band form the fact that the staples are interconnected at the longitudinal edges of the band prevents individual staples from being 'bent up at the end and thereby to obstruct the i'unctioning of the stapling machine. While in the staple bands with a web or webs on the bridge it is necessary to` indent or weaken 11'? the webs in order to facilitate the separation of individual staples, in the present case only so much connecting material is provided at the end of the branches that will always enable the individual staples to be easily separated.

In the accompanying drawing one form of the staple band according to the invention is shown by way of example, Figure 1 illustrating a at band and Figure 2 a staple bar. Figure 3 shows an individual staple.

The individual staples 2 of the staple band are separated by the interstices 4 and are interconnected at the ends. In the case of the band shown in Figure 1 (the edges of which are bent down to form the branches of the staples) the connection between the staples is obtained only by the webof material 1 running alongside the edges. In the case of the staple bar shown in Figure 2 the connection between the staples 2 is effected through the branches 3 only, 'that is to say through the web of material l disposed at the end` tration. Figure 3 shows on the ends of the two branches of the staple the place of connection with the adjacent staple, that is to say the connecting material.

What I claim is:

1. As an article of manufacture a band of staples comprising a body divided into a plurality of individual staples of substantially U-shapedl right angles to the main portion so that the inl dividual staples assume asubstantially U-shaped form.

3. As an article of manufacture a band of staples' formed from -a strip of sheet material the marginal portions of which are bent downwardly while i'n addition the strip is slit transversely to provide a plurality of individual staples, the slits being arranged so that parts of the marginal bent portions are left connected together.`

LUDWIG SACHS. 

